That is a “non-question”. It smuggles in a premise that should be objected to immediately; to whit: that it is the place of the college to “let” somebody carry a gun. It is not up to the college to decide such things.
The University can provide personal 24 hour security against a stalker who is at large and recently discovered with a “rape kit”. The University will be financially liable for any failures or lapses of this security.
Alternatively, the University can refund & reimburse all money that the student spent or invested in this school plus provide a stipend while the student searches for a school that respects her rights as an adult.
Or the University will encourage the student to carry concealed weapons throughout the University property against a known and identified threat.
Any attempts to expel the student to avoid liability by the University will be met with a lawsuit.
Remember the basic premise of government: the innocent are expendable. It is the threat whose rights must be protected. If you even hint the police are not enough, you become the enemy for dissing their competence.